BMW 528i 2000 (V) ABS and ASC lights appear on dash and at the same time the speedo stops working. Very intermittent but fails more often than works. I have changed ABS sensor at rear wheel but no change. Could this be ABS control module? can I send mine off for repair/rebuild rather than out hundreds???

SOURCE: 2000 323ci tractn ctrl lt comes on and stops power to rear wheels

THE LIGHTS COMES ON WHEN ONE OR TWO WHEELS STARTS SPINING (WHEN TERES NO TRACTION) ITS STOPS THE CAR FROM SPINING SO ITSTOPS POWER GOING TO THAT WHEEL.

MAKE SURE YOR TYRES ARE INFLATED RIGHT OR YOUR TYRES ARE WEARING OUT

SOURCE: speedo and abs light on bmw 5 series

I've had the same problem twice on my 1999 528. The problem is your ABS module. (Bosch 5.7 to be exact.) The failure mode is temperature sensitive and shows up after driving. To test this, turn off the car, get a can of freeze spray and cool down the module. Inverting a can of compressed air used for computer cleaning works too. Give it a healthy freeze, then start up the car again. If the lights are out, then you know your problem. 
All sorts of things don't work when the module is bad. Speedo, windshield washers only give you one speed, fuel gauge drifts back and forth, cruise control,  check engine lights, airbag lights .... and so on, you get the picture, basically anything connected to the computer. My new (great) mechanic calls this the BMW christmas tree. 
You can either replace the module with a new one from the dealer, very expensive, or get it rebuilt. There are a number of rebuilders out there, so take your pick. I've used ModuleMaster in the past and they've been great. $300 and works like a charm. Google them to find their web site, and good luck. 
db

Raymond Ramirez

• 333 Answers
• Posted on Mar 28, 2009

SOURCE: Abs and orange triangle light with circled arrow

I seemed to have run into a website that you might want to check out. about a 1/4 the way donw the page


http://www.bimmerfest.com/forums/showthread.php?t=57010

SOURCE: asc alwayes on after i changed he ABS box

hello mazeer, when you changed the abs/dsc/asc control unit did you have the replacement coded to your vehicle. Also after changing to another unit, it is usually necessary to recalibrate the sensors. if your vehicle does not recognize the replacement unit, you will have a constant warning lamp. Most dealers/shops charge appr. 1hr to code and calibrate the control unit.

SOURCE: my car is bmw 525i 2000 model asc sensor alwayes

if you changed the asc module, the module has to be programmed/coded after replacement. If it was a new part there should be no problem programming the new control unit. I would recommend taking the vehicle to the dealership to allow them to program the control unit.If you have access to the programming don't forget to take the asc module out of "end of belt line mode" and most likely the steering angle sensor will have to be aligned